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(No Model.)

T. B. &' T. R. JORDAN.

ROTARY PULVERIZER.

No. 249,770. Patented Nov. 22,1881.

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NlTED STATES PATENT Farce.

THOMAS B. JORDAN AND THOMAS R. JORDAN, OF LONDON, ENGLAND.

ROTARY PULVERIZER.

SPECIFICATION forming part of Letters Patent No. 249,770, dated November 22, 1881.

Application filed December 10, 1880.

(No model.) Patented in England December 3, 1870, and November 11, 1880, in France January 28, 1880. and in Belgium February 2, 1880.

To all whom it may concern:

Be it known that we, THOMAS BROWN Joa- DAN and THOMAS ROWLAND JORDAN, subjects of Her Britannic Majesty, both residing at Adelaide Chambers, Gracechurch street, in the city of London, engineers, have invented new and useful Improvements in Rotary Pulverizers, (partly patented to us by British Letters Patent No. 4,951,1oearing date December 3, 1879; by French Patent No. 134,788, bearing date January 28, 1880; by Belgian Patent No. 50,465, bearin g date February 2, 1880, and in part by British Letters Patent No. 4,637, hearing date November 11, 1880,) of which the following is a specification.

Our invention is designed for crushing by impact or pulverizing to any degree of lineness rock, mineral, or any other material in a simple and economical manner. We attain these objects by the mechanism illustrated in the accompanying drawings, in which like letters refer to like parts in each of the figures, and in which Figure 1 is a vertical section through the whole machine. Fig. 2 is a perspective outside view of the machine with modified feed. Fig. 3 is a vertical transverse section through the heaters and crushing-chamber, enlarged. Fig. l is a perspective view of thebcaters removed from the casin g.

Aaretwo castings,bolted together by flanges B, either on a vertical or horizontal center line, which form a shallow cylindrical crushing-chamber, C. These castingsAcarry long bearings D on either side of the flat faces, in which run two shafts, E,'in the same axis, but entirely independent of each other, and which meet end to end in the center of the crushingchamber 0. On the inside ends of these shafts E are keyed two heaters, F, preferably of chilled cast-iron or cast-steel, with a suitable number of arms connected together by strong brackets. These heaters revolve nearly in contact with each other and the sides and periphery of the chamber 0, and, as well as the inside of the chamber, are formed by turning, it needful, so as to make a nearly true fit. The blades of these boaters F are the same width as the portion of the chamber in which they revolve, and have their adjacent faces in each beater parallel to each other, and making an angle of forty-five degrees with the axis of the shafts. The ends G of the blades are made very heavy and massive, and have their striking-faces in the direction of their motion bent obliquely toward the shaft, and not radial, as in thelower part of the blades. Curved or oblique vanes H, of the proper shape to give centrifugal force to the air, are cast upon the brackets connecting these blades, so that the air is drawn forcibly through external apertures, J, into the body of the chamber, from which it is ejected into the delivery-pipes K by the close-fitting breaking-blades F. These external apertures, J, are conveniently in the form of round holes on each side of the chamber, close to the central shaft, and are fitted with adjustable shutters or doors L, so that the orifices can be closed wholly or partially, as desired. The delivery of the crushed material from the crushing-chamber is through plain open orifices M and vertical or inclined delivery-pipes K, one from each side of the machine. The ends of these delivery-pipes may be made adjustable toany required height, preferably by means of telescopic or other slidingjoiuts. On the outer ends of the shafts E are keyed drivingpulleys N.

Above the crushing-chamber is placed afeedhopper, O, in which may be fitted a revolving paddle-wheel, P, driven by bevel-gearing from the main shaft E by a vertical shaft and a worm and pinion, Q. This revolving paddle insures a constant and regular feed to the machine, and prevents back draft from the chamher. We may fit in two breaking-jaws actuated by eccentrics or other means from the shaft, or from a countershaft, to partially break and regulate the feed of the material, and the amount of their movement may be regulated according to the material. To the feed apparatus maybe added a sloping tray, R, with adjustment-rod S, by which the inclination of the tray may be fixed as desired to give any required speed of motion of the material toward the mouth of the hopper.

The action of the machine is as follows: The two beaters F are revolved in opposite directions by means of driving-belts on the pulleys N keyed thereto. The speed maybe advantageously from five hundred revolutions per minute to one thousand five hundred, according to the character of the material to be acted upon. The material is fed into the sloping tray R or direct into the hopper 0 above the machine, whence it is fed in regular quantity into the pulverizer by the revolving paddle-wheel P or other suitable feed-motion. The material thus falls in its crudest and largest form upon the extreme circumference of the rapidly-revolving heaters F, that is at the point G of highest velocity, and therefore of greatest impaet. The inclined faces of the heaters F thus strike the falling material against the faces of adjacent heaters on the opposite revolving fan, obviating centrifugal action, and therefore impact of the material upon the interior of the casing. This operation is repeated in rapid succession while the material is fallingthrough the pulverizer. The induced blast of air then carries the particles toward the delivery-orificesM and up the delivery-pipesK. The size or weight of the pulverized particles that can be carried sufliciently high for actual delivery from the delWery-pipes is exatly determined by the strength of the induced blast and by the height of the delivery-pipes, both of which are adjustable at pleasure, as hereinhefore described. Those particles which are too heavy or coarse to he so ejected remain within the crushing-chamber until sufliciently pulverized to be suspended by the induced blast, or if any escape they return by gravitation into the crushing-chamber, and are there again subjected to the percussive action of the pulverizer until reduced to the required fineness. The crushed material is thus delivered and separated in the most perfect manner, and to any degree of fineness, without the use of sieves.

We are aware that prior to our invention rotary pulverizing-machines have been made with revolving heaters and separation by an air-blast. We do not, therefore, claim such broadly; but

What we claim, and desire to secure by Letters Patent, is

In a pulverizer, the oppositely-revolving wheels F, each having curved or oblique vanes H, and provided with radial arms having at their extremities heaters Gr,forwardly inclined at an angle to the radius of the wheel of about forty-five degrees, in combination with the crushing-case A, having air-ingress openings J and dischargespouts K, substantially as and for the purpose set forth.

In witness whereof we, the said THOMAS BROWN JORDAN and THOMAS RQWLAND J OR- DAN, have hereunto set our hands.

London, 12th November, 1880.

THOMAS BROWN JORDAN. THOMAS ROWLAND JORDAN.

Witnesses:

CHAS. Jo. UOURTIS, 153 Kings Road, 8. W., Clerk to lllessrs.

T. B. Jordan (h Son, 1. S. JORDAN, I 3 Park Villa, Lower Norwood, Clerk to Messrs. T. B. Jordan d; Son. 

